Overlapping text in QStatusBar

**anirbanjoy** · 28th March 2011, 11:56

Hi,

I have an applciation with a simple status bar.

normal.PNG

The issue is whenever I resize the main window, the texts in the status bar are overlapping with each other.

overlapped.PNG

I want them to be a nicely cropped like any native windows application (e.g. Windows Word). Any idea on how to achieve that?

Following code shows how I initialize the text in this status bar.

Qt Code:

Switch view

void SSDMainWindow::createStatusBar()
{
	statusLabel = new QLabel(tr("Ready"));
	statusLabel->setIndent(3);
	statusBar()->addWidget(statusLabel);
 
	gridSpacingLabel = new QLabel(tr(" Grid Spacing:                "));
	gridSpacingLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	gridSpacingLabel->setMinimumSize(gridSpacingLabel->sizeHint());
	statusBar()->addPermanentWidget(gridSpacingLabel);
	//statusBar()->addWidget(gridSpacingLabel);
	gridSpacingLabel->setText(tr(" Grid Spacing:"));
 
	xPosLabel = new QLabel(tr(" X: 640        "));
	xPosLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	xPosLabel->setMinimumSize(xPosLabel->sizeHint());
	statusBar()->addPermanentWidget(xPosLabel);
	// statusBar()->addWidget(xPosLabel);
	xPosLabel->setText(tr(" X:"));
 
	yPosLabel = new QLabel(tr(" Y: 480        "));
	yPosLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	yPosLabel->setMinimumSize(yPosLabel->sizeHint());
	statusBar()->addPermanentWidget(yPosLabel);
	// statusBar()->addWidget(yPosLabel);
	yPosLabel->setText(tr(" Y:"));
 
	widthLabel = new QLabel(tr(" Width: 640        "));
	widthLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	widthLabel->setMinimumSize(widthLabel->sizeHint());
	statusBar()->addPermanentWidget(widthLabel);
	// statusBar()->addWidget(widthLabel);
	widthLabel->setText(tr(" Width:"));
 
	heightLabel = new QLabel(tr(" Height: 480        "));
	heightLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	heightLabel->setMinimumSize(heightLabel->sizeHint());
	statusBar()->addPermanentWidget(heightLabel);
	// statusBar()->addWidget(heightLabel);
	heightLabel->setText(tr(" Height:"));
 
	unsavedDataLabel = new QLabel();
	QPixmap pixmap(":changes.png");
	unsavedDataLabel->setPixmap(pixmap);
	unsavedDataLabel->setMinimumSize(unsavedDataLabel->sizeHint());
	statusBar()->addPermanentWidget(unsavedDataLabel);
	// statusBar()->addWidget(unsavedDataLabel);
	unsavedDataLabel->clear();
 
	if (statusBarManager) {
		statusBarManager->connectUnsavedData(this, SLOT(unsavedData(bool)));
		statusBarManager->connectPositionChanged(this, SLOT(positionChanged(qreal, qreal)));
		statusBarManager->connectSizeChanged(this, SLOT(sizeChanged(qreal, qreal)));
		statusBarManager->connectGridSpacingChanged(this, SLOT(gridSpacingChanged(int)));
	}
}

void SSDMainWindow::createStatusBar()
{
	statusLabel = new QLabel(tr("Ready"));
	statusLabel->setIndent(3);
	statusBar()->addWidget(statusLabel);

	gridSpacingLabel = new QLabel(tr(" Grid Spacing:                "));
	gridSpacingLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	gridSpacingLabel->setMinimumSize(gridSpacingLabel->sizeHint());
	statusBar()->addPermanentWidget(gridSpacingLabel);
	//statusBar()->addWidget(gridSpacingLabel);
	gridSpacingLabel->setText(tr(" Grid Spacing:"));

	xPosLabel = new QLabel(tr(" X: 640        "));
	xPosLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	xPosLabel->setMinimumSize(xPosLabel->sizeHint());
	statusBar()->addPermanentWidget(xPosLabel);
	// statusBar()->addWidget(xPosLabel);
	xPosLabel->setText(tr(" X:"));

	yPosLabel = new QLabel(tr(" Y: 480        "));
	yPosLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	yPosLabel->setMinimumSize(yPosLabel->sizeHint());
	statusBar()->addPermanentWidget(yPosLabel);
	// statusBar()->addWidget(yPosLabel);
	yPosLabel->setText(tr(" Y:"));

	widthLabel = new QLabel(tr(" Width: 640        "));
	widthLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	widthLabel->setMinimumSize(widthLabel->sizeHint());
	statusBar()->addPermanentWidget(widthLabel);
	// statusBar()->addWidget(widthLabel);
	widthLabel->setText(tr(" Width:"));

	heightLabel = new QLabel(tr(" Height: 480        "));
	heightLabel->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	heightLabel->setMinimumSize(heightLabel->sizeHint());
	statusBar()->addPermanentWidget(heightLabel);
	// statusBar()->addWidget(heightLabel);
	heightLabel->setText(tr(" Height:"));

	unsavedDataLabel = new QLabel();
	QPixmap pixmap(":changes.png");
	unsavedDataLabel->setPixmap(pixmap);
	unsavedDataLabel->setMinimumSize(unsavedDataLabel->sizeHint());
	statusBar()->addPermanentWidget(unsavedDataLabel);
	// statusBar()->addWidget(unsavedDataLabel);
	unsavedDataLabel->clear();

	if (statusBarManager) {
		statusBarManager->connectUnsavedData(this, SLOT(unsavedData(bool)));
		statusBarManager->connectPositionChanged(this, SLOT(positionChanged(qreal, qreal)));
		statusBarManager->connectSizeChanged(this, SLOT(sizeChanged(qreal, qreal)));
		statusBarManager->connectGridSpacingChanged(this, SLOT(gridSpacingChanged(int)));
	}
}

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Regards,
Anirban

**high_flyer** · 28th March 2011, 13:14

Then you have to avoid setting minimumSize on the labels.

**anirbanjoy** · 29th March 2011, 09:11

Thanks high_flyer,

That removed the overlapping. But still the texts are getting cramped into each other.

cramped.PNG

I want the QLabels to maintain their width, and, if resized, they should go out of sight. Like it happens in MS Word or any other native MS app.

Regards,
Anirban

**high_flyer** · 29th March 2011, 09:39

I see.
Well, the current behavior is due to the fact that the QStatusBar has a layout inside it.
But you want it with a fixed minimum (the minimum being the combined length of all the displayed information in it).
I would therefore try to set a minimum width to the status bar.

**anirbanjoy** · 29th March 2011, 13:34

Unfortunately does not solve the problem.

The proposed solution limits the minimum width of the whole application plus I do not see this hiding-of-text-on-resizing-application (as it works on native windows apps).

**high_flyer** · 29th March 2011, 13:43

Hmm... maybe some one else can help you more.
I think this is not possible with QStatusBar, without sub classing, and overwriting the layout behavior.

**anirbanjoy** · 31st March 2011, 08:26

I have some more inputs. It looks like a problem of base class QMainWindow. For the same code, Qt3 and Qt4 behaves in a different manner.

Qt3:
- beheaves like native windows apps. QStatusBar::addPermanentWidget really makes the widget permamanent. The user can not resize the main window in a way so that the permanent widgets are hidden.

qt3.PNG

Qt4:
- On resizing certain texts of the supposed-to-permamnent-widget becomes hidden.

qt4.PNG

It's not recommneded to go back to Qt3. So, I need to find out how to take care of this issue in Qt4.

I'm using the portedcanvas Qt example to single out this problem. I added a private method createStatusBar() in canvas.cpp:

Qt Code:

Switch view

void Main::createStatusBar()
{
	statusLabel = new QLabel(tr("Ready"));
	gridSpacingLabel = new QLabel(tr(" Grid Spacing:  20"));
	xPosLabel = new QLabel(tr(" X: 640 "));
	yPosLabel = new QLabel(tr(" Y: 640 "));
	widthLabel = new QLabel(tr(" Width: 640 "));
	heightLabel = new QLabel(tr(" Height: 480 "));
	unsavedDataLabel = new QLabel();
	QPixmap pixmap(":changes.png");
	unsavedDataLabel->setPixmap(pixmap);
 
	statusBar()->addPermanentWidget(gridSpacingLabel);
	statusBar()->addPermanentWidget(xPosLabel);
	statusBar()->addPermanentWidget(yPosLabel);
	statusBar()->addPermanentWidget(widthLabel);
	statusBar()->addPermanentWidget(heightLabel);
	statusBar()->addPermanentWidget(unsavedDataLabel);
 
	statusBar()->addWidget(statusLabel);
	statusBar()->showMessage(tr("Showing Message"));
}

void Main::createStatusBar()
{
	statusLabel = new QLabel(tr("Ready"));
	gridSpacingLabel = new QLabel(tr(" Grid Spacing:  20"));
	xPosLabel = new QLabel(tr(" X: 640 "));
	yPosLabel = new QLabel(tr(" Y: 640 "));
	widthLabel = new QLabel(tr(" Width: 640 "));
	heightLabel = new QLabel(tr(" Height: 480 "));
	unsavedDataLabel = new QLabel();
	QPixmap pixmap(":changes.png");
	unsavedDataLabel->setPixmap(pixmap);

	statusBar()->addPermanentWidget(gridSpacingLabel);
	statusBar()->addPermanentWidget(xPosLabel);
	statusBar()->addPermanentWidget(yPosLabel);
	statusBar()->addPermanentWidget(widthLabel);
	statusBar()->addPermanentWidget(heightLabel);
	statusBar()->addPermanentWidget(unsavedDataLabel);

	statusBar()->addWidget(statusLabel);
	statusBar()->showMessage(tr("Showing Message"));
}

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This method is called at the end of constructor. Also note the small code change to switch between Qt3 and Qt4 [ Q"3"MainWindow(parent,name,f) ]

Qt Code:

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Main::Main(QGraphicsScene& c, QWidget* parent, const char* name, Qt::WindowFlags f) :
    Q3MainWindow(parent,name,f),
	//QMainWindow(parent,name,f),
    canvas(c)
{
    editor = new FigureEditor(canvas,this);
    QMenuBar* menu = menuBar();
 
    Q3PopupMenu* file = new Q3PopupMenu( menu );
    file->insertItem("&Fill canvas", this, SLOT(init()), Qt::CTRL+Qt::Key_F);
    file->insertItem("&Erase canvas", this, SLOT(clear()), Qt::CTRL+Qt::Key_E);
    file->insertItem("&New view", this, SLOT(newView()), Qt::CTRL+Qt::Key_N);
    file->insertSeparator();
    file->insertItem("&Print...", this, SLOT(print()), Qt::CTRL+Qt::Key_P);
    file->insertSeparator();
    file->insertItem("E&xit", qApp, SLOT(quit()), Qt::CTRL+Qt::Key_Q);
    menu->insertItem("&File", file);
 
    Q3PopupMenu* edit = new Q3PopupMenu( menu );
    edit->insertItem("Add &Circle", this, SLOT(addCircle()), Qt::ALT+Qt::Key_C);
    edit->insertItem("Add &Hexagon", this, SLOT(addHexagon()), Qt::ALT+Qt::Key_H);
    edit->insertItem("Add &Polygon", this, SLOT(addPolygon()), Qt::ALT+Qt::Key_P);
    edit->insertItem("Add Spl&ine", this, SLOT(addSpline()), Qt::ALT+Qt::Key_I);
    edit->insertItem("Add &Text", this, SLOT(addText()), Qt::ALT+Qt::Key_T);
    edit->insertItem("Add &Line", this, SLOT(addLine()), Qt::ALT+Qt::Key_L);
    edit->insertItem("Add &Rectangle", this, SLOT(addRectangle()), Qt::ALT+Qt::Key_R);
    edit->insertItem("Add &Sprite", this, SLOT(addSprite()), Qt::ALT+Qt::Key_S);
    edit->insertItem("Create &Mesh", this, SLOT(addMesh()), Qt::ALT+Qt::Key_M );
    edit->insertItem("Add &Alpha-blended image", this, SLOT(addButterfly()), Qt::ALT+Qt::Key_A);
    menu->insertItem("&Edit", edit);
 
    Q3PopupMenu* view = new Q3PopupMenu( menu );
    view->insertItem("&Enlarge", this, SLOT(enlarge()), Qt::SHIFT+Qt::CTRL+Qt::Key_Plus);
    view->insertItem("Shr&ink", this, SLOT(shrink()), Qt::SHIFT+Qt::CTRL+Qt::Key_Minus);
    view->insertSeparator();
    view->insertItem("&Rotate clockwise", this, SLOT(rotateClockwise()), Qt::CTRL+Qt::Key_PageDown);
    view->insertItem("Rotate &counterclockwise", this, SLOT(rotateCounterClockwise()), Qt::CTRL+Qt::Key_PageUp);
    view->insertItem("&Zoom in", this, SLOT(zoomIn()), Qt::CTRL+Qt::Key_Plus);
    view->insertItem("Zoom &out", this, SLOT(zoomOut()), Qt::CTRL+Qt::Key_Minus);
    view->insertItem("Translate left", this, SLOT(moveL()), Qt::CTRL+Qt::Key_Left);
    view->insertItem("Translate right", this, SLOT(moveR()), Qt::CTRL+Qt::Key_Right);
    view->insertItem("Translate up", this, SLOT(moveU()), Qt::CTRL+Qt::Key_Up);
    view->insertItem("Translate down", this, SLOT(moveD()), Qt::CTRL+Qt::Key_Down);
    view->insertItem("&Mirror", this, SLOT(mirror()), Qt::CTRL+Qt::Key_Home);
    menu->insertItem("&View", view);
 
    menu->insertSeparator();
 
    Q3PopupMenu* help = new Q3PopupMenu( menu );
    help->insertItem("&About", this, SLOT(help()), Qt::Key_F1);
    help->setItemChecked(dbf_id, TRUE);
    menu->insertItem("&Help",help);
 
    createStatusBar();
 
    setCentralWidget(editor);
 
    printer = 0;
 
    init();
}

Main::Main(QGraphicsScene& c, QWidget* parent, const char* name, Qt::WindowFlags f) :
    Q3MainWindow(parent,name,f),
	//QMainWindow(parent,name,f),
    canvas(c)
{
    editor = new FigureEditor(canvas,this);
    QMenuBar* menu = menuBar();

    Q3PopupMenu* file = new Q3PopupMenu( menu );
    file->insertItem("&Fill canvas", this, SLOT(init()), Qt::CTRL+Qt::Key_F);
    file->insertItem("&Erase canvas", this, SLOT(clear()), Qt::CTRL+Qt::Key_E);
    file->insertItem("&New view", this, SLOT(newView()), Qt::CTRL+Qt::Key_N);
    file->insertSeparator();
    file->insertItem("&Print...", this, SLOT(print()), Qt::CTRL+Qt::Key_P);
    file->insertSeparator();
    file->insertItem("E&xit", qApp, SLOT(quit()), Qt::CTRL+Qt::Key_Q);
    menu->insertItem("&File", file);

    Q3PopupMenu* edit = new Q3PopupMenu( menu );
    edit->insertItem("Add &Circle", this, SLOT(addCircle()), Qt::ALT+Qt::Key_C);
    edit->insertItem("Add &Hexagon", this, SLOT(addHexagon()), Qt::ALT+Qt::Key_H);
    edit->insertItem("Add &Polygon", this, SLOT(addPolygon()), Qt::ALT+Qt::Key_P);
    edit->insertItem("Add Spl&ine", this, SLOT(addSpline()), Qt::ALT+Qt::Key_I);
    edit->insertItem("Add &Text", this, SLOT(addText()), Qt::ALT+Qt::Key_T);
    edit->insertItem("Add &Line", this, SLOT(addLine()), Qt::ALT+Qt::Key_L);
    edit->insertItem("Add &Rectangle", this, SLOT(addRectangle()), Qt::ALT+Qt::Key_R);
    edit->insertItem("Add &Sprite", this, SLOT(addSprite()), Qt::ALT+Qt::Key_S);
    edit->insertItem("Create &Mesh", this, SLOT(addMesh()), Qt::ALT+Qt::Key_M );
    edit->insertItem("Add &Alpha-blended image", this, SLOT(addButterfly()), Qt::ALT+Qt::Key_A);
    menu->insertItem("&Edit", edit);

    Q3PopupMenu* view = new Q3PopupMenu( menu );
    view->insertItem("&Enlarge", this, SLOT(enlarge()), Qt::SHIFT+Qt::CTRL+Qt::Key_Plus);
    view->insertItem("Shr&ink", this, SLOT(shrink()), Qt::SHIFT+Qt::CTRL+Qt::Key_Minus);
    view->insertSeparator();
    view->insertItem("&Rotate clockwise", this, SLOT(rotateClockwise()), Qt::CTRL+Qt::Key_PageDown);
    view->insertItem("Rotate &counterclockwise", this, SLOT(rotateCounterClockwise()), Qt::CTRL+Qt::Key_PageUp);
    view->insertItem("&Zoom in", this, SLOT(zoomIn()), Qt::CTRL+Qt::Key_Plus);
    view->insertItem("Zoom &out", this, SLOT(zoomOut()), Qt::CTRL+Qt::Key_Minus);
    view->insertItem("Translate left", this, SLOT(moveL()), Qt::CTRL+Qt::Key_Left);
    view->insertItem("Translate right", this, SLOT(moveR()), Qt::CTRL+Qt::Key_Right);
    view->insertItem("Translate up", this, SLOT(moveU()), Qt::CTRL+Qt::Key_Up);
    view->insertItem("Translate down", this, SLOT(moveD()), Qt::CTRL+Qt::Key_Down);
    view->insertItem("&Mirror", this, SLOT(mirror()), Qt::CTRL+Qt::Key_Home);
    menu->insertItem("&View", view);

    menu->insertSeparator();

    Q3PopupMenu* help = new Q3PopupMenu( menu );
    help->insertItem("&About", this, SLOT(help()), Qt::Key_F1);
    help->setItemChecked(dbf_id, TRUE);
    menu->insertItem("&Help",help);

    createStatusBar();

    setCentralWidget(editor);

    printer = 0;

    init();
}

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Anyone else? any other idea?

Regards,
Anirban

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